Metal weather strip



Sept. 24, 1935. o. IDAHL METAL WEATHER STRIP Filed May 10, 1935 Patented Sept. 24, 1935 were UNETED fi'iATES PATENT- OFFIE METAL WEATHER STRIP Oscar Dahl, Chicago, Ill.

Application May 10, 1935, Serial No. 20,734

4 Claims.

able skill and time to install, frequently necessitating a special shaping of the edges of the windows and frames upon which the parts of the weather-strip are attached. Because of the fact that the parts of these multiple weather-strips.

must fit each other with exactness in order to seal the window opening, any subsequent damage or distortion of one of the parts materially reduces the efficiency of the weather-strip.

One of the features of my improved weatherstrip is its unitary character and its inherent resiliency which permits it to yield in a plurality of directions. Another feature is the provision of a distinct eaves that overhangs the meeting edges between the window and frame to shed water away from the bottom of the window and thereby prevent water dripping into or reaching said meeting edges.

Still another feature of my invention is its novel and simple construction which permits it to be economically manufactured and adapts it for ready installation upon a window without necessitating altering or reconstructing the meeting edges of the window or frame. My improved weather-strip is dependable in operation and in the event a portion thereof is accidentally bent or distorted its efficiency is not diminished.

Other features and advantages of my weatherstrip will be apparent to persons skilled in the art after my invention is understood from the following description taken in connection with the accompanying drawing that form a part of this specification. Said drawing is more or less schematic for the purpose of disclosing a typical or preferred embodiment of my invention and the views'are drawn to an exaggerated scale for clearness.

In the drawing:

Figure l is a view in vertical section. showing my weather-strip attached to the lower edge of a casement window with the latter approaching the usual stop member of the sash.

Figure 2 is a view similar to Figure 1 showing the relative positions of the parts when the window is closed.

Figure 3 is a perspective of an end portion of my weather-strip detached from the window.

In the different views of the drawing, the same reference characters identify like parts wherever such parts appear, and referring to Figs. 1 5 and 2 the lower member of the window which is designated as 5 is provided with a rectangular shaped rabbet 6 that extends from end to end of said lower member and is adapted,'when the window is closed, to engage an elongated stop 1 on 10 the window-sill 8 as shown in Fig. 2. The abovementioned parts are common construction in standard casement Windows and sashes.

The weather-strip which I have devised is made of a length of relatively thin resilient or springy 15 metal and, generally stated, consists of a portion that fastened to the lower outer face of the window above the rabbet, and a resilient substantially V-shaped portion extending outwardly from the fixed portion and terminating in a section that 2n projects into the rabbet in a position where it will engage the top surface of the stop when the window is closed. In addition to the foregoing, the apex of the V-shaped portion which is farthest from the window member has a sharply defined 2 drip edge that conveys water away from the window and sheds it far enough beyond the window to prevent it reaching the meeting edges of the window and stop.

The attaching portion or fixed flange ii of the 2-9 weather-strip is made by forming a longitudinal break or bend it near the margin of the metal strip and the remaining (V-shaped) portion of the metal strip extends outward away from said attaching flange.

The straight portion I! adjacent or next the flange inclines downward and outward to form what might be termed the "roof, which at its outer extremity is provided with an oppositely disposed bend l2 from which depends a narrow substantially vertical apron l3.

Observed in section these three parts of the weather-strip are of substantially Z-shap'e and they are so constituted that they provide an upper yieldable element, one edge portion being an- 45 chored to the window and the outer edge portion being spaced from the window in a horizontal plane above the top surface of the window stop 1.

The metal at the lower edge of the apron i3 is given a sharp bend l4 obliquely in an upward direction to form a narrow inclined eaves I5 of substantially the samewidth as the apron, and the metal is then bent at it opposite to the previous bend M to dispose the remaining portion downwardly and inwardly which provides a 55 sealing tongue H. The free edge l8 of this tongue extends into the rabbet E as seen in Fig. 1'

and terminates in a horizontal plane below the horizontal upper surface of the stop I, and the marginal portion of the tongue is deflected upwardly oblique the body of the tongue by providing a bend i9. By reason of this construction and disposition of the tongue the space between the rabbet and the stop is effectively sealed against passage of air, dust or foreign matter by reason of the engagement of the bend IS with the top surfaoeof the stop When the stop is engaged by the tongue during closing movement the resiliency of the structure causes the drip edge portion to move down slightly below the horizontal plane of the space being sealed, and the edge E8 of the tongue will engage the roof of the rabbet. This provides a double seal.

Another seal is provided by reason of the fact that the top face of the tongue engages window at the upper outer corner of the rabbet. All of this is shown in Fig. 2. The portion of the weather-strip between the drip apex at the sharp bend M and the free edge i8 of the tongue is substantially Z-shape in section similar to the other portion of the weather-strip. Both of these Z-shaped portions are inherently resilient and yieldable in themselves and said portions yield with respect to each other at the acute bend M.

It will be noted the sealing tongue is unsecured to and does not contact the edge of the window when the latter is open, and for this reason said tongue is capable of flexing throughout its entire width from the acute bend to its free edge in the same manner that the upper water shed l i may be flexed at the bend ii]. The construction of the weather-strip permits it to be readily attached to the window without unhinging the latter because of the fact that only one row of nails or brads is required for the purpose of anchoring the structure and these nails are driven into the vertical face of the window. Further, it will be seen that no alteration of the window is required, nor is it necessary to mount a special fixture or a special coacting strip on the sill, because the weather-strip is attached to and cooperates with a window and sill of ordinary and standard construction. I

All of this simplifies the steps required for mounting the weather-strip and it may be readily attached by an unslgilled person without the use of special tools, thus materially reducing the expense.

What I claim is:-

1. In combination with a casement window having a rabbet in its lower portion and a sill stop adapted to be engaged by said rabbet, a weatherstrip consisting. of a resilient strip of metal one margin of which provides an attaching flange that is anchored to the window above the rabbet and is bent at its lower edge to provide a downwardly sloping flexible water-shed extending away from the anchoring flange, a substantially vertical drip apron depending from the outer edge of and at an angle to said water-shed, and a freely flexible sealing tongue supported solely by and projecting from the lower edge of said drip apron into said rabbet, the plane of said tongue normally intersecting the horizontal plane of the upper face of said stop whereby a closing movement of the window causes said tongue to flex upwardly and bear against the upper surface of said stop.

2. A Weatherstrip comprising a strip of resilient metal the marginal portions upon each side of its longitudinal center being bent substantially Z-shape in cross-section with the respective margin portions disposed Wholly out of contact with each other, said marginal portions being connected to each other by a relatively sharp bend and arranged to form an irregular V-shape with one of said marginal portions disposed above the other, the upper flange of the upper marginal portion being disposed flat against the lower face of a movable member and anchored thereto to provide the sole support for the Weatherstrip, and part of the lower marginal portion providing a freely flexible sealing tongue that extends into a rabbet in the lower edge of the movable member and is engaged by the window stop when the latter is in coactive relation with the rabbet.

3. The combination with a casement window provided with a rabbet at its lower edge and a sill stop that enters said rabbet when the window is closed, of a Weatherstrip consisting of a resilient strip of metal having a marginal flange anchored to the window adjacent the rabbet, and a resilient V-shaped portion extending from said flange, one of the members of said -shaped portion providing a sealing tongue the free edge of which projects into said rabbet and is shaped to yieldably contact a wall of the rabbet and a portion of the stop.

4. The combination with a casement window provided with a rabbet at its lower edge and a sill stop that enters said rabbet when the window is closed, of a Weatherstrip consisting of a resilient strip of metal having a marginal flange anchored to the window adjacent the rabbet, and a resilient V-shaped portion extending from said flange, one of the members of said V-shaped portion providing a sealing tongue projecting into said rabbet, said tongue having a longitudinal bend contiguous its free edge, whereby when the window is closed said bend is in contact with the top surface of said stop and the free edge is urged against a wall of the rabbet.

OSCAR DAHL. 

